Beyond the dress — the science of illusion
By Pascal Wallisch, PhD | Posted on 27 February 2015
The brain lives in a bony shell. The completely light-tight nature of the skull renders this home a place of complete darkness. So the brain relies on the eyes to supply an image of the outside world, but there are many processing steps between the translation of light energy into electrical impulses that happens in the eye and the neural activity that corresponds to a conscious percept of the outside world.
In other words, the brain is playing a game of telephone and – contrary to popular belief – our perception corresponds to the brains best guess of what is going on in the outside world, not necessarily to the way things actually are.